To analyze the factors affecting stigma and quality of life in hemiplegic stroke patients following suicide attempts in nursing homes and to provide a theoretical basis for developing interventions in clinical care. General demographic information, the Stigma Scale for Chronic Illness (SSCI), and the Quality of Life Scale (SF-36) were used to investigate 259 patients with hemiplegia after stroke following nursing home suicide from January to April 2024. Univariate statistical analyses were performed to assess the impact of potential determinants on quality of life. Multiple regression models and stratified analyses with smoothed curve fitting were used for further evaluation. Multiple regression modeling showed that the factors influencing the quality of life in hemiplegic stroke patients following suicide attempts in nursing homes were stigma, Age, marital status, education, type of occupation, monthly household income, and duration of illness. The level of quality of life before unadjusted variables was strongly associated with high school and college education (β = 11.9, 95% CI: 8.2–15.6; P < 0.001), (β = 13.1, 95% CI: 9.2 -16.9; P < 0.001). After adjusting for confounders such as marital status (Married, Unmarried), Age (< 30, 30–40, 40–50, > 50) (β = 8.1, 95% CI: 4 .6–11.6; P < 0.0001). (β = 9.5, 95% CI: 6.0–13.1;P < 0.0001), the results were not significantly different. Curve fitting revealed threshold nonlinear associations between intrinsic and extrinsic stigma and quality of life, with quality of life decreasing as stigma increased. Conclusion Stigma is negatively correlated with the level of quality of life in hemiplegic stroke patients following suicide attempts in nursing homes. Different demographic profiles moderated patients’ quality of life levels, and effective psychological intervention strategies should be used to improve patients’ quality of life.